The real question should be why your generation could watch Mr. Rogers, but most kids of this generation can't concentrate enough to enjoy it. I changed my kid's routines away from most TV (allowing slower paced educational stuff) and they seem to be much better for it.

It's worth noting that France banned the marketing of shows targeted at children under three [source](https://www.telegraph.co.uk/news/worldnews/europe/france/259...)

[TV causes concentration issues](https://www.news.iastate.edu/news/2010/jul/TVVGattention) [similar study](http://pediatrics.aappublications.org/content/113/4/708?sso=...)

[TV causes school and health problems](https://www.medicinenet.com/script/main/art.asp?articlekey=1...)

There's a much more questionable effect of increasing violence [source](http://www.latimes.com/health/la-hew-kidviolence2002-story.h...)